Rock breaker and pulverizer.



I No.827,745. I PATENTED AUG. 7, 1906.

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w. ALMEARRALLS. ROCK BREAKER AND PULVERIZER.

APPLIGATION FILED MAR. 27. 1905.

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RQCK BREAKER AND PULVERIZER.

Specification of Letters Patent.

Patented Aug. :7, 1906.

Apnlieation filed March 27.1905. Serial No. 252,292.

To all whom it 77mg concern.-

' Be it known that I, W'] LLiAM. A. M EnaALLs, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Rock Breakers and Pulverizers, of which the following is a specification.

This invention relates to imprownnents in rock breakers and pulverizcrs, and is an improvement on the style of rock-breaker being gripped between said sides and frame and the ball-races in the cylinder. Should a ball-race wear irregularly or should it not be perfectly true in the first instance, this will cause fracture of the ball. When the ball fractures, instead of permitting the crushingeylinder to roll around, as itshould, said cylinder stands in one place and the vertically;- reciprocating crushing-jaw then impinges all the time against one part only of the crushing-cylinder, wearing it flat, and the machine then becomes absolutely worthless until a new erushirig-cylinder is substituted. To remove thiscylindcr, the shaft thereof has to be driven out longituoirally, and this is a slow and expensive operation. l\loreover, the cyl inder has to be entirely thrown away, which is a very great waste of metal. These objec tions to its practical use have been so serious that very few were sold during the life of the patent.

'lh object of the present invention is to provide a construction which will render the above form of rocl\=breaker practical and suceessful.

in 'the accompanying drawings, Figure 1 is a perspective view of my improved rockbrealnir. Fig. 2 is a vertical section thereof on a somewhat larger scale. Fig. 3 is a vertical section through the grip. Fig. 4 is a cross-section of the grip on the line A A of Fig. 3. Fig. 5'is a broken longitudinal section through the crushing-cylinder. Fig. 6 is a detail of a modified form of grip.

Referring to the drawings, 1 represents the frame of the rock-breaker, in which is mounted an eccentric shaft 2, carrying the usual llywheels and pulleys. "lhe concave crushingjaw 3 has its upper end eccentrically supported on said shaft, as shown at 4 in Fig. 2. In the face of said jaw is secured the crushing-plate 5, the crushing-face of which is corrugated horizontally or flat or any shape. At the rear of the lower end of said crushing-j aw is a bearing-block 6, which receives the front edge of the support-plate 7, the rear edge of whichis received in a bearing-block 8, adj astably supported by means of pltes 9. A hook 1.0 is attached to the rear side of the crushing-jaw and is drawn backward by means of a compressed spring 11 The crushing-cylimler '12 is made with a main body 13, keyed on the shaft 14, and an external shell 15, held in place by bolts 16, having one-sidi-id heads which overlie a circular shoulder on the shell and are secured by the nuts 17. For the purpose of preventing reverse movement of the crushing-cylinder said shaft is extended through hearings in the frame, and upon each end thereof secured a grip-wheel 18, preferably grooved, as shown at 19. Said wheels turn adjacent to curved bearing-plates 220, formed upoi standards 21, ren'iovably seemed, as shown at 22, to the frame 1 of the machine. These bearingplat s are curved, as shown at 23, to form channels for the balls 24, retained therein by end plates '25. These grooves or channels decrease in depth. from the upper to the lower portion, so that the bottom of the groove at the lower portion thereof approaches more nearly to the grip-wheel than at the upper portion. The consequence is that upon any reverse movement of the crushing-eylimler the balls are immediately gripped between said grip-wheels and l earirig-plates, said balls at all-timcs falling down in the grooves oi the grip-wheels and bearing-plates as far as possible.

in Fig. i is illustrated a modification in which the grip-wheel is formed with ratchetteeth 26, engaged by a pawl L7. The advantages of this construction are that there is no wear on the crushing-cylinder that is due to the operation of gripping to prevent the rc verse movement. The wear is entirely upon the auxiliary grip-wheels, the balls, and the which is an im ortant consideration 1n millwork. The ba ls are not now gripped be tween the crushing-cylinder and the sides of the frame, exerting a longitudinal pressure upon said cylinder and frame, but are gri ped between the auxiliary gripwheels an the bearing-plates, exerting a radial pressure therebetween. It is to be understood that instead of the balls here shown the usual equivalents thereof, rollers or other devices that will turn by friction, may be substituted.

I claim '1. A rock-breaker, comprising a rocking jaw, a cylinder in front of said jaw, bearings 1n which said journal is revolubly sup orted, a grip-wheel on the shaft of said cylin er outside one of said bearings, a grip member having a track which converges downward toward said wheel, and a rolling-grip carried by said track, as set forth.

2. A rock-breaker, comprising a rocking jaw, a cylinder in front of said jaw, bearings I in Which-said journal is revolubly supported,

a grip-wheel on the shaft of said cylinder outside one of said bearings, said wheel having a peripheral groove, a grip member having an semis inclined track, and a rolling-grip carried by said track, as set forth.

3. A rock breaker, comprising a rocking jaw, a cylinder in front of said j aw, bearings in which said journal is revolubly supported,

jaw, a cylinder revolubl sup orted in front of said jaw, a grip-whee on t e shaft of said cylinder, said wheel having a peripheral groove, a grip member having an inclined track, and spherical balls of different size carried by said track, as set forth. t

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

WILLIAM MERRALLS.

Witnesses FRANCIS M. WRIGHT, Bnssns GORFINKEL. 

